Expanding the Roll In / Roll Out animations and adding a PHP Builder

I've expanded the Roll In / Roll Out animations to be bidirectional. I saved the original .rollIn / .rollOut classes for backward compatibility. Check it out here: http://cdpn.io/dcKmn

I've also added a PHP builder application that can auto-build the full and minified source files. It also serves as a source viewer page. You can preview it at http://animate.trezy.com.